DERIVATIVE INSTRUMENTS - Narrative (Details) € in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 CHF (SFr)	Sep. 30, 2020 USD ($)	Oct. 04, 2021 USD ($)	Sep. 30, 2021 EUR (€)	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 21, 2020 USD ($)	Dec. 21, 2020 CHF (SFr)	Oct. 02, 2017 USD ($)	Oct. 02, 2017 CHF (SFr)
Derivative [Line Items]
Gain (loss) recorded in AOCL, change in fair value			$ 100,000
Gain expected to be reclassified to earnings in the next twelve months	$ 5,300,000		5,300,000
Designated as Hedging Instrument
Derivative [Line Items]
Total derivatives designated as hedges — Assets	33,197,000		33,197,000						$ 12,920,000
Gain (loss) recorded in AOCL, change in fair value	16,415,000	$ (21,497,000)	78,806,000		$ (63,194,000)
Foreign Exchange Forward | Not Designated as Hedging Instrument
Derivative [Line Items]
Current notional amount									$ 9,700,000
Loss on foreign currency derivatives			200,000
Total derivatives designated as hedges — Assets	200,000		200,000
Cross-currency swap
Derivative [Line Items]
Current notional amount								$ 7,300,000		$ 471,600,000	SFr 420,100,000
Intercompany loan quarterly payments | SFr				SFr 5,800,000
Cross-currency swap | Cash Flow Hedges | Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) reclassified into other income	4,300,000	(6,900,000)	34,300,000		(12,000,000)
Cross-currency swap | Cash Flow Hedges | Designated as Hedging Instrument | Subsequent Event
Derivative [Line Items]
Current notional amount						$ 50,000,000
Cross-currency swap | Net Investment Hedges
Derivative [Line Items]
Current notional amount	52,000,000		52,000,000				€ 44.9
Cross-currency swap | Net Investment Hedges | Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) reclassified into other income	1,700,000	2,200,000	5,200,000		6,600,000
Gain (loss) recorded, net investment hedge, change in fair value	6,900,000	(11,300,000)	20,500,000		5,100,000
Cross-currency swap | Codman | Cash Flow Hedges | Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) reclassified into other income	1,500,000	1,500,000	4,100,000		4,500,000
Gain (loss) recorded in AOCL, change in fair value	7,000,000	$ 36,300,000	(6,300,000)		$ 2,700,000
Gain expected to be reclassified to earnings in the next twelve months	$ 6,900,000		$ 6,900,000
Cross-currency swap | Short | Codman
Derivative [Line Items]
Current notional amount												$ 300,000,000
Cross-currency swap | Long | Codman
Derivative [Line Items]
Current notional amount | SFr													SFr 291,200,000